<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<body>
  <script>
    var arr = [{label:'男',value: 1}, {label:'女',value: 0}]
 
 function f(arr) {
   // 写代码，得到
  const obj = {}
  arr.forEach(item => {
      obj[item.value] = item.label
      console.log(item);
       })
     
  return obj
 }
 
 var obj = f(arr);
 console.log(obj)
 // obj2 = {'1': '男','0': '女'}
  </script>
</body>
</html>